Improvement in wire-cutting



V J. A DT.

Wire-Cutting Machine. No. 203,691. Patented May 14, I878.

N.PETER$, FHOTO-LITHOGRAFHER. WASHINGTON. E'C.

, hereinafter described, and more particularly UNITED STAT-Es PATENTOFFICE.-

JOHN ADT, OF NEW HAVEN, CONNECTICUT.

IMPROVEMENT IN WIRE-CUTTING. MACHINES.

Specifioation forming part of Letters Patent No. 203,6?1, dated May 14,1878 application filed April 30, 1878.

To all whom it may concern:

Be it known that I, JOHN AM, of New Haven, in the county of New Havenand State of Connecticut, have invented a new Improvement in Machinesfor Cutting Wire and I do hereby declare the following, when taken inconnection with the accompanying drawings, and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, in

Figure 1, a front view; Fig. 2, a vertical sectional view.

This invention relates to an improvement in machines for cutting wireinto predetermined lengths, as for blanks from which articles are to bemade, or the article of manufacture known as wire rods; the object beingthe construction of an automatic machine which will feed the wire andcut it into predetermined lengths; and the invention consists in theconstruction and combination of parts, as

stantaneous. From the slide F an arm, L, projects toward the aperture a,and-to this there is loosely hung a cutter-holder, b, upon a pivot, 01,projecting both ways from the pivot. In the end of this holder b towardthe aperture a the cutter e is fixed. The normal condition of the cutteris as seen in Fig. 1, the cutter hanging downward, and out of the vertical line of the aperture a, and it is turned into this position whenthe bar F descends in consequence of an inclined stop, P, on the face ofthe head. Therefore when the bar F is raised, the cutter and its holderwill remain in that position till the cutter has passed above theaperture a. Then the end of the cutterholder opposite the cutter strikesa stop, T, above, which turns the cutter-holder into a horizontalposition, bringing the cutter into the vertical line of the aperture a,and this condition occurs just as the cam G has reached its highestpoint and is bearing against the projection f on the slide F, as seen inFig. 2. During this upward movement of the cutter the wire has beenpassing through the aper ture a, and so soon as the bar F escapes fromthe cam G it instantaneously descends, in its descent cutting off thewire.

It will be understood that the cutter runs close to the face of the headE, as seen in Fig.

recited in the claims.

A is the bed of the machine, on which, in suitable bearings B, the shaft0 is arranged, and so as to revolve by the application of power theretoin any convenient manner, here represented as by a train of gearing froma counter-shaft, D, and driving-pulley D, thereon. In thehead E there isa horizontal aperture, a, through which the Wire is passed, as seen inFig. 2. The feeding device is arranged in rear of this aperture, and ispreferably a pair of grooved rolls, F F, to which a constant revolutionis imparted, the friction of the rolls on the wire being sufficient todraw the wire into the machine, but yet turn freely upon the wire whenthe progress of the wire is interrupted. Other feeds may, however, besubstituted, if desirable.

In connection with the feed a straightening apparatus of any of theknown constructions is used, so that the wire is straightened as it isdrawn into the machine.

In front of the head E there is a vertical sliding bar, F, to which avertical movement is imparted by a cam, G, on the shaft 0,. the said barbeing shown in its lowest position in Fig. 2, and just on the point ofescaping from the cam. It is drawn down by a spring, H, so as to makethe descent very quick or inport the wire against the descending cutter.

P, is again raised, more wire fed in, a second piece cut, and so on.

relative velocities of the feed-rolls and the cam G. The feed-rolls aredriven directly from the shaft D hence change of gearing between theshaft D and shaft 0, on which the cam is arranged, will give a differentvelocity to the said two shafts. If, therefore, a shorter cut of wire isrequired, the cam G must revolve with greater velocity. On the contrary,if a longer piece of wire is required, the cam G must revolve slower,and the chain of gearing between the shaft D and the shaft 0 must bevaried accordingly-that isto say, the time between the successivedescents of the cutter determines the length of the wire cut.

This change of gearing is too well understood to require furtherexplanation here than The cutter returns to its position on the stop Thelength of the wireis adjusted by the to say it is substantially likethat used in l bination, substantially as described, of a feed-'screw-cutting lathes and similar mac ines. ing device, an aperturethrough which the This order of adjustment may be reversed, wire isdelivered, a sliding bar and cutter making the revolution of the camconstant, hung thereon, and stops'to turnthe said outand adjusting thefeed accordingly. ter from and into the line of the aperture 1claimthrough which the wire is fed, with interme- 1. In a machine forcutting wire, the comdiate gearing between the said feed and thebination, substantially as described, of a feeddevice for operating thecutter-bar, whereby ing device, an aperture through which the therelative movements of the feed and cutter wire is delivered, a slidingbar and cutter may be varied, substantially as and for the hung thereon,and stops to turn the said out purpose described.

ter from and into the line of the aperture JOHN ADT. through which thewire is fed, substantially Witnesses: as described. JOHN E. EARLE,

2. In a machine for cutting wire, the com 7 H. A. KITSON.

